PV-supported Heat Pump System
IEA-Paris, 20131022Björn Karlsson
Malardalen University, Västerås, Sweden
PV or Thermal Collectors?
• The most interesting question today is:
• PV or Solar Collector?
• They compete on the same roof area?
• IEA cannot handle this question!
PV or Thermal Collectors?
• In Sweden electric energy is often used for delivering domestic hot water
• This is an advantage for PV
• The Swedish answer to the question is PV!
PV or Thermal Collectors?
• Solar thermal system can not compete in combination with heat pumps or districtheating in Sweden
• PV and heat pumps or PV and district heatingare good combinations
Bed rock Heat Pump
Heat pump and solar collectors?
MaReCo i Torsåker.
PV+Heat Pump or Solar Collector
0
10
20
30
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70
1 2 3 4 5 6 7 8 9 10 11 12
Solvärme
PV+VP
Energy demand of building
Monthly Net Meetering
10
Purchased Electricity
Use or export PV-power?
12
Saved fraction with net meetering
13
Increasing self consumption
• Net meetering
• Storage in water volume
• Storage in Batteries
Administrativt (nettodebitering)
15
f=0,42, X=0
Elbehov=17280 kWh/år, 3,2 kWp PV, 21m2
”Vanligt hus ”+ VP och PV
f=1, X=0,37
Elbehov=17280 kWh/år, 8 kWp PV, 55m2
”Vanligt hus ”+ VP+PV
f=0,53, X=0
Elbehov=9964 kWh/år, 2,9 kWp PV, 20m2
”Välisolerat hus ”+ VP+PV
f=0.68, X=0
Elbehov=9964 kWh/år, 4,7 kWp PV, 31m2
”Välisolerat hus ”+ VPVertikala PV
f=1, X=0.21
Elbehov=9964 kWh/år, 7 kWp PV, 46m2
”Välisolerat hus ”+ VPVertikala PV
Hus PV (kWp) f-Andel Sol X-Nätutbyte
Standard 3,2 0,42 0
StandardNollenergi
8 1 0,37
Välisolerat 2,9 0,53 0
Välisolerat 4,7-vertikala 0,68 0
VälisoleratNollenergi
7,0-vertikala 1 0,21
Sammanfattning
Large Collectors with Reflectors
Utbyte i kWh/månad i olika lutning
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JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
30°-2,4kWp
70°-3,3kWp
90°-4,8kWp